If patients with chronic bronchitis quit smoking in a timely manner and are properly treated and cared for, they can generally survive with the disease for about 20 years or more. However, if chronic bronchitis is combined with serious infections and ventilation dysfunction, it may be life-threatening. Chronic bronchitis is an infectious disease of the lower respiratory tract and is inextricably linked to smoking. Chronic bronchitis is mainly manifested as cough, sputum, and wheezing, and can be diagnosed for more than 3 months per episode and for 2 or more years in a row. Patients with recurrent episodes will have dyspnea, bilateral lower limb edema, and telangiectatic breathing in addition to coughing, sputum, and wheezing. Patients need long-term home oxygen therapy, and if recurrent episodes are combined with emphysema it can cause COPD, which can lead to respiratory failure and heart failure, posing a threat to the patient’s life. In addition, the main and primary task of patients with chronic bronchitis is to quit smoking, pay attention to rest, and exercise properly. Pay attention to home hygiene, keep ventilation and prevent colds.